<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Object</title>
</head>
<body>
    <button onclick="funC()">点我一下</button>
</body>
    <script>
        var a = new String("李伟聪")
        var b = new Number(12)
        var c = BigInt(21)
        var d = new Boolean(true)

        function funC(){
            console.log(a + ":" + typeof(a))
            console.log(a)
            console.log(b + ":" + typeof(b))
            console.log(b)
            console.log(c + ":" + typeof(c))
            console.log(c)
            console.log(d + ":" + typeof(d))
            console.log(d)
        }
    </script>
</html>